import re
def Verify_ipv4(ip):
    ip0 = r'^\d{1,3}\.\d{1,3}\.\d{1,3}.\d{1,3}\$'
    if not re.match(ip0, ip):
        return False
    num0 = ip.split('.')
    for num1 in num0:
        if num1 > 255:
            return False
    return True

ip1 = "200.200.100.100"
print(Verify_ipv4(ip1))
